129. The explanation just given may be thus summed up: Spirit has the power of acting upon matter. Individual spirits draw, from the universal cosmic matter, the elements necessary to form, according to their wishes, objects having the appearance of the various bodies existing on the earth. They can also, by their will, effect the particular transformation of elementary matter which gives to it certain determinate properties. This faculty is inherent in the nature of spirits, who often exercise it instinc- tively, when necessary, without being able to explain how they do it. Objects formed by a spirit have only a temporary existence, subordinate to his will, or to the necessity of the case; he can make and unmake them at pleasure. These objects may, in certain cases, be made to present to us all the appearances of reality; that is to say, they may become, for the time being visible and tangible. In such action there is formation, but not creation; for no spirit can evolve something out of nothing.